'Legitimately' definitions:

Definition of 'legitimately'

(from WordNet)
adverb
In a manner acceptable to common custom; "you cannot do this legitimately!" [syn: legitimately, lawfully, licitly] [ant: illegally, illegitimately, illicitly, lawlessly]
adverb
In a lawfully recognized manner; "let's get married so our child can be born legitimately" [ant: illegitimately, out of wedlock]

Definition of 'Legitimately'

From: GCIDE
  • Legitimately \Le*git"i*mate*ly\ (-m[asl]t*l[y^]), adv. In a legitimate manner; lawfully; genuinely. [1913 Webster]